Security System Engineer (M/F/X)

Leonardo Belgium is supporting EU Institutions, NATO, and international organizations in strengthening their cyber defence capabilities, improving resilience, and protecting critical systems against evolving cyber threats.

Within Leonardo Belgium , the EU CyberSec Regional Center serves as a center of cybersecurity expertise, delivering security services and solutions across complex and mission-critical environments.

You will join a team of cybersecurity professionals working on the deployment, operation, and continuous improvement of security solutions supporting critical infrastructures and services.

This role is ideal for infrastructure engineers who enjoy securing and modernizing enterprise systems, with exposure to on-premises, cloud, and hybrid technologies while working on critical environments.

We encourage applications from candidates who may not meet every requirement listed but who are eager to learn and grow within a cybersecurity environment.

Job Specifications

• Location : Strasbourg
• Start date : As soon as possible, early applications are appreciated
• Type of contract : Freelance
• Security Clearance : Eligibility for EU-PSC required

Job Description

As a Security System Engineer , you will drive the implementation, management, and evolution of secure systems and infrastructure, ensuring their stability, security, and operational readiness.

You will:

• Administer, optimize, and maintain complex enterprise systems, virtualization platforms, and server infrastructures (On-Premises, Cloud, Hybrid)
• Implement and manage high-availability solutions, backup strategies, and Disaster Recovery procedures to guarantee business continuity
• Lead infrastructure hardening initiatives in compliance with stringent cybersecurity policies and standards
• Automate routine system administration tasks and configuration management processes
• Troubleshoot incidents, ensuring minimal downtime for critical infrastructure
• Collaborate closely with DevOps and Security teams to support infrastructure modernization

Profile

Experience / Education / Certifications

• Bachelor's degree in Computer Science, System Engineering, Infrastructure Administration, Information Technology, or a related field, would be appreciated, but alternative educational paths with proven experience will be considered as well
• Several years of professional experience in System engineering or Infrastructure Administration, with exposure to secure environments
• Relevant certifications, in particular related to cybersecurity, are highly appreciated

Successful candidates would typically have

• Strong expertise in Windows Server and/or Linux (RHEL, CentOS) administration
• Robust experience with virtualization technologies (e.g. VMware vSphere) and Active Directory / Entra ID
• Proficiency in scripting and automation tools (e.g. Ansible)
• Proven experience in the management of security of systems and infrastructure
• Structured, analytical mindset with a proactive approach to infrastructure stability and security
• Fluent in English, with excellent communication skills for international collaboration

Nice to have

• Experience with access management technologies is considered a plus
• Familiarity with containerization (Docker, Kubernetes).
• Previous exposure to EU Institutions, NATO, or other regulated environments.
• French, Dutch, and/or Italian language skills.

What's in it for you?

• Work in a high-visibility cybersecurity environment supporting EU and international organizations
• Take ownership of secure infrastructures supporting mission-critical environments
• Contribute to large-scale international projects involving modern cybersecurity technologies
• Collaborate with experienced architects, cybersecurity specialists, and infrastructure engineers in multidisciplinary teams
• Develop your expertise while working on complex technical challenges within a highly regulated environment
• Grow within an international cybersecurity organization offering long-term career opportunities

Once we receive your CV, we will evaluate it carefully. Should there be a match for this or any other position at Leonardo Belgium, we will be in touch. If there is no match at this stage, we will keep your profile in consideration for future opportunities.